:root {
  --prism-night: #050609;
  --prism-ink: #e8eaf2;
  --prism-muted: #9aa3bd;
  --prism-faint: #5d6580;
  --prism-hair: rgba(154, 163, 189, .2);
  --prism-violet: #8b6bff;
  --prism-display: "Syne", system-ui, sans-serif;
  --prism-mono: "IBM Plex Mono", "Courier New", monospace;
}

.prism-intro {
  position: relative;
  isolation: isolate;
  box-sizing: border-box;
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
  color: var(--prism-ink) !important;
  background:
    radial-gradient(ellipse 78% 62% at 52% 45%, #101525 0%, #090b12 44%, var(--prism-night) 76%),
    var(--prism-night);
  font-family: var(--prism-mono);
}

.prism-intro *,
.prism-exhibit * { box-sizing: border-box; }

.prism-intro__stage,
.prism-intro__host,
.prism-intro__fallback,
.prism-intro__grain,
.prism-intro__vignette {
  position: absolute;
  inset: 0;
}

.prism-intro__stage { z-index: 0; }
.prism-intro__host { z-index: 2; }
.prism-intro__host canvas,
.prism-stage__host canvas { display: block; width: 100%; height: 100%; touch-action: none; }

.prism-intro__fallback {
  z-index: 1;
  opacity: 1;
  transition: opacity .7s ease;
}

.prism-intro[data-prism-state="live"] .prism-intro__fallback { opacity: 0; }

.prism-static {
  position: absolute;
  left: 50%;
  top: 46%;
  width: min(48vw, 520px);
  aspect-ratio: 1.45;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 36px 55px rgba(0, 0, 0, .54));
}

.prism-static__body {
  position: absolute;
  z-index: 2;
  left: 36%;
  top: 7%;
  width: 29%;
  height: 78%;
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  background:
    linear-gradient(108deg, rgba(255,255,255,.04) 4%, rgba(226,234,255,.34) 36%, rgba(87,101,146,.12) 56%, rgba(238,244,255,.28) 93%);
  border-bottom: 1px solid rgba(232,234,242,.54);
  box-shadow: inset 0 -28px 42px rgba(139,107,255,.08);
}

.prism-static__body::after {
  content: "CAIT";
  position: absolute;
  left: 18%;
  top: 54%;
  color: rgba(235,240,255,.3);
  font: 650 clamp(11px, 2vw, 21px)/1 var(--prism-display);
  letter-spacing: .18em;
  transform: rotate(-8deg);
}

.prism-static__ray,
.prism-static__spectrum {
  position: absolute;
  top: 53%;
  height: 2px;
  transform-origin: left center;
}

.prism-static__ray {
  left: -8%;
  width: 47%;
  background: linear-gradient(90deg, transparent, rgba(245,248,255,.94));
  box-shadow: 0 0 12px rgba(200,215,255,.75);
  transform: rotate(-4deg);
}

.prism-static__spectrum {
  z-index: 1;
  left: 60%;
  width: 48%;
  height: 17%;
  opacity: .78;
  background: linear-gradient(180deg, rgba(255,79,88,.88), rgba(255,215,106,.72) 24%, rgba(83,230,166,.64) 48%, rgba(79,168,255,.7) 73%, rgba(139,107,255,.78));
  clip-path: polygon(0 42%, 100% 0, 100% 100%, 0 58%);
  filter: blur(.2px) drop-shadow(0 0 14px rgba(130,160,255,.28));
  transform: rotate(4deg);
}

.prism-intro__grain,
.prism-intro__vignette { z-index: 3; pointer-events: none; }

.prism-intro__grain {
  inset: -50%;
  width: 200%;
  height: 200%;
  opacity: .052;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: prism-grain 9s steps(6) infinite;
}

.prism-intro__vignette {
  background:
    radial-gradient(ellipse 120% 92% at 50% 42%, transparent 49%, rgba(2,3,6,.64) 100%),
    linear-gradient(to bottom, rgba(3,4,8,.56), transparent 22%),
    linear-gradient(to top, rgba(3,4,8,.66), transparent 28%);
}

.prism-intro__copy {
  position: relative;
  z-index: 4;
  display: flex;
  min-height: 100vh;
  min-height: 100svh;
  flex-direction: column;
  justify-content: space-between;
  width: min(100% - 48px, 1320px);
  margin: 0 auto;
  padding: max(28px, env(safe-area-inset-top)) 0 max(28px, env(safe-area-inset-bottom));
  pointer-events: none;
}

.prism-intro__kicker,
.prism-intro__truth,
.prism-intro__enter { pointer-events: auto; }

.prism-intro__kicker {
  margin: 0;
  color: var(--prism-muted);
  font: 500 10px/1.5 var(--prism-mono);
  letter-spacing: .28em;
  text-transform: uppercase;
}

html body .prism-intro .prism-intro__title {
  width: min(100%, 11ch);
  margin: auto 0 clamp(30px, 7vh, 78px);
  color: var(--prism-ink) !important;
  font: 250 clamp(58px, 10.4vw, 148px)/.84 var(--prism-display);
  letter-spacing: -.07em;
  text-wrap: balance;
}

.prism-intro__line { display: block; overflow: hidden; padding: .05em 0 .1em; }
.prism-intro__line > span { display: inline-block; }
.prism-intro__mark { font-weight: 650; color: #fff !important; }
.prism-intro__air { color: #dfe5ff; text-shadow: 0 0 18px rgba(139,107,255,.68); }

/* Archive controls belong after the optical threshold. Their fixed desktop
   dock otherwise competes with and can overlap the intro's enter affordance. */
.prism-threshold-visible .cait-utility-dock {
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.prism-intro__foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: end;
}

.prism-intro__truth {
  max-width: 58ch;
  margin: 0;
  color: var(--prism-muted);
  font: 400 10px/1.65 var(--prism-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

html[data-theme] .prism-intro__enter,
.prism-intro__enter {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-height: 46px;
  padding: 8px 0 8px 18px;
  border-left: 1px solid rgba(232,234,242,.46);
  color: var(--prism-ink) !important;
  font: 500 10px/1 var(--prism-mono);
  letter-spacing: .26em;
  text-transform: uppercase;
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease;
}

.prism-intro__enter::after { content: "↓"; color: var(--prism-violet); font-size: 18px; }
.prism-intro__enter:hover { border-left-color: #fff; color: #fff !important; }
.prism-intro__enter:focus-visible { outline: 3px solid #fff; outline-offset: 5px; }

.prism-threshold-init .prism-intro__line > span,
.prism-threshold-init .prism-intro__kicker,
.prism-threshold-init .prism-intro__foot { opacity: 0; }
.prism-threshold-init .prism-intro__line > span { transform: translateY(115%); }
.prism-threshold-ready .prism-intro__line > span {
  opacity: 1;
  transform: translateY(0);
  transition: transform 1.15s cubic-bezier(.16,1,.3,1), opacity .45s ease;
}
.prism-threshold-ready .prism-intro__line:nth-child(2) > span { transition-delay: .14s; }
.prism-threshold-ready .prism-intro__kicker,
.prism-threshold-ready .prism-intro__foot {
  opacity: 1;
  transition: opacity .8s ease .42s;
}

#archive-entry { scroll-margin-top: 0; }
#archive-entry:focus { outline: none; }
#archive-entry:focus-visible { outline: 3px solid var(--color-accent, #8b6bff); outline-offset: -3px; }

/* Prism-only gallery and full lab share the threshold's optical language. */
body.prism-exhibit {
  min-width: 320px;
  margin: 0;
  color: var(--prism-ink);
  background: var(--prism-night);
  font-family: var(--prism-mono);
}
.prism-exhibit a { color: var(--prism-muted); }
.prism-exhibit a:hover { color: #fff; }
.prism-exhibit :focus-visible { outline: 3px solid var(--prism-violet); outline-offset: 4px; }
.prism-exhibit__bar { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 16px max(20px, calc((100vw - 1240px)/2)); border-bottom: 1px solid var(--prism-hair); }
.prism-exhibit__brand { color: #fff !important; font: 650 18px/1 var(--prism-display); letter-spacing: .02em; text-decoration: none; }
.prism-exhibit__nav { display: flex; gap: 20px; flex-wrap: wrap; font-size: 9px; letter-spacing: .2em; text-transform: uppercase; }
.prism-exhibit__main { width: min(100% - 40px, 1240px); margin: auto; padding: clamp(34px, 7vw, 86px) 0 80px; }
.prism-exhibit__hero { display: grid; grid-template-columns: minmax(0, .8fr) minmax(420px, 1.2fr); gap: clamp(32px, 7vw, 90px); align-items: center; min-height: calc(100svh - 150px); }
.prism-exhibit__kicker { margin: 0 0 20px; color: var(--prism-muted); font: 500 10px/1.5 var(--prism-mono); letter-spacing: .26em; text-transform: uppercase; }
.prism-exhibit__title { margin: 0; color: #fff; font: 250 clamp(52px, 8vw, 116px)/.84 var(--prism-display); letter-spacing: -.065em; }
.prism-exhibit__title strong { font-weight: 650; }
.prism-exhibit__lede { max-width: 54ch; margin: 28px 0 0; color: var(--prism-muted); font-size: 13px; line-height: 1.8; }
.prism-stage { position: relative; min-height: min(68vw, 680px); overflow: hidden; border: 1px solid var(--prism-hair); background: radial-gradient(ellipse 80% 70% at 50% 42%, #101526, #050609 72%); }
.prism-stage__host,
.prism-stage__fallback,
.prism-stage__vignette { position: absolute; inset: 0; }
.prism-stage__host { z-index: 2; }
.prism-stage__fallback { z-index: 1; }
.prism-stage[data-prism-state="live"] .prism-stage__fallback { opacity: 0; }
.prism-stage__vignette { z-index: 3; pointer-events: none; background: radial-gradient(ellipse 118% 92% at 50% 42%, transparent 52%, rgba(2,3,6,.62)); }
.prism-stage__meta { position: absolute; z-index: 4; right: 14px; bottom: 12px; left: 14px; display: flex; justify-content: space-between; gap: 12px; color: var(--prism-faint); font: 500 9px/1.5 var(--prism-mono); letter-spacing: .14em; text-transform: uppercase; pointer-events: none; }
.prism-panel { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr); gap: 30px; margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--prism-hair); }
.prism-panel h2 { margin: 0 0 10px; color: #fff; font: 600 22px/1.1 var(--prism-display); }
.prism-panel p,
.prism-panel li { color: var(--prism-muted); font-size: 11px; line-height: 1.7; }
.prism-controls { display: flex; flex-wrap: wrap; gap: 8px; }
.prism-control { min-height: 42px; padding: 9px 12px; border: 1px solid rgba(154,163,189,.38); color: var(--prism-ink); background: transparent; font: 600 9px/1 var(--prism-mono); letter-spacing: .16em; text-transform: uppercase; cursor: pointer; }
.prism-control:hover,
.prism-control.is-active { border-color: var(--prism-violet); background: rgba(139,107,255,.16); }
.prism-control:disabled { opacity: .46; cursor: not-allowed; }
.prism-status { color: var(--prism-faint); font: 500 9px/1.6 var(--prism-mono); letter-spacing: .12em; text-transform: uppercase; }

@keyframes prism-grain {
  0% { transform: translate(0, 0); }
  25% { transform: translate(2%, -3%); }
  50% { transform: translate(-3%, 2%); }
  75% { transform: translate(3%, 4%); }
  100% { transform: translate(-1%, -2%); }
}

@media (max-width: 760px) {
  .prism-intro__copy { width: min(100% - 32px, 1320px); padding-top: max(20px, env(safe-area-inset-top)); padding-bottom: max(22px, calc(env(safe-area-inset-bottom) + 62px)); }
  .prism-intro__title { width: 100%; margin-bottom: clamp(24px, 5vh, 44px); font-size: clamp(52px, 18vw, 82px); letter-spacing: -.065em; }
  .prism-intro__foot { grid-template-columns: 1fr; gap: 18px; }
  .prism-intro__enter { justify-self: start; }
  .prism-static { top: 43%; width: min(92vw, 460px); }
  .prism-intro__truth { max-width: 42ch; font-size: 9px; }
  .prism-exhibit__bar { align-items: flex-start; flex-direction: column; }
  .prism-exhibit__main { width: min(100% - 28px, 1240px); padding-top: 38px; }
  .prism-exhibit__hero,
  .prism-panel { grid-template-columns: 1fr; min-height: 0; }
  .prism-stage { min-height: 66svh; }
}

@media (prefers-reduced-motion: reduce) {
  .prism-intro__grain { animation: none; }
  .prism-intro__fallback,
  .prism-intro__line > span,
  .prism-intro__kicker,
  .prism-intro__foot { opacity: 1 !important; transform: none !important; transition: none !important; }
  .prism-intro__host,
  .prism-stage__host { display: none; }
}